Publications

Fabrication and replication of re-entrant structures by nanoimprint lithography methods

Journal of Vacuum Science & Technology B: Vol 36, No 6

In this work, the authors present and demonstrate a simple method to fabricate and mass replicate re-entrant structures. The method consists of the direct imprinting of polymer mushroomlike microstructures produced by a combination of photolithography and nickel up-plating process. In particular,
they have studied the conditions to generate highly robust mushroomlike topographies and their topographical impact on the replication process. They discuss all the imprinting conditions suitable to replicate such topographies using both ultraviolet light assisted nanoimprint lithography (UV-NIL) and
thermal NIL methods in two polymer films, poly(methyl methacrylate) and polypropylene, and a hybrid (organic–inorganic) UV light curable photoresist, namely, Ormocomp. Re-entrant topographies have been widely studied for liquid/oil repelling and dry adhesive properties, whereas in their experiments, they have proved evidence for their amphiphobic potential.
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an antimicrobial film for hospital surfaces

Impact

FLEXPOL project is developing a novel film made up of micro and nanostructures armed with antimicrobial essential oils to pierce and dismantle pathogens. This safe, affordable technology may have the power to prevent bacterial infections in hospital settings and beyond.


In-line metrology for roll-to-roll UV assisted nanoimprint lithography using diffractometry

APL Materials: Vol 6, No5

We describe and discuss the optical design of a diffractometer to carry out in-line quality control during roll-to-roll nanoimprinting. The tool measures diffractograms in reflection geometry, through an aspheric lens to gain fast, non-invasive information of any changes to the critical dimensions of target grating structures. A stepwise tapered linear grating with constant period was fabricated in order to detect the variation in grating linewidth through diffractometry. The minimum feature change detected was 40 nm to a precision of 10 nm. The diffractometer was then integrated with a roll-to-roll UV assisted nanoimprint lithography machine to gain dynamic measurements in situ.
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The european project Flexpol has the R&D department of Propagroup as one of the main actors…

Propagroup website

Thanks to its R&D department dedication, Propagroup, with some scientific, technical and business excellences that constitute Flexpol consortium in which it brings part, it is a main actor of a new european project for the development of an antimicrobic adhesive film studied to minimize as much as possible a contamination with bacterias inside hospitals.
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Adhesive Film Will Be Antimicrobial

AIPA website

From bed rails, tray tables, telephones and alarm buttons to furnishings, door handles or taps: hospitals are hotbeds for bacteria, which can lead to life-threatening infections in fragile patients.
The EU project FLEXPOL brings together a consortium of research and industry partners from Italy, Spain, Portugal, United Kingdom and Germany to develop a pilot line for cost-efficient antimicrobial adhesive film manufacturing. These films are applied to large-area surfaces around patients in order to reduce the risk of contamination. The synergic action of material and surface structure is able to kill various germs and inhibit bacterial growth with an efficiency of 99.9 percent – this will not only ensure the health protection of both patients and medical staff but also yield a considerable economic benefit due to reduced expenditures for detergents and sanitizers.


ROLL TO ROLL, a system to manufacture adhesive films with antimicrobial activity

Biodonostia website

IIS Biodonostia and Donostia University Hospital are participating in the European project “FLEXPOL,” developing a pilot line for the efficient, low-cost production of antimicrobial adhesive films, validating the film’s activity and valuing its efficacy, durability and resistance, in addition to other elements.
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Sistema de producción “roll-to-roll” para la fabricación de películas adhesivas anti-microbianas

Tekniker Website

Sistemas de producción “roll-to-roll” para llevar a cabo una fabricación eficiente y de bajo coste de películas adhesivas anti-microbianas de gran tamaño.
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Großflächige antimikrobielle Folien produzieren

DeviceMed Website

Von Bettgittern, Klapptischen, Telefonen und Alarmknöpfen bis hin zu Mobiliar, Türgriffen oder Wasserhähnen: Bakterienherde in Krankenhäusern können besonders bei anfälligen Patienten zu lebensbedrohlichen Infektionen führen. Im EU-Projekt Flexpol entwickelt ein internationales Projektkonsortium unter Leitung des Fraunhofer-Instituts für Produktionstechnologie IPT ein Produktionssystem, mit dem antimikrobielle Oberflächenstrukturen großflächig und kosteneffizient auf Kunststofffolien angebracht werden können. Durch die Kombination von Material und Oberflächenstruktur sollen Keime mit einer Effizienz von bis zu 99 Prozent abgetötet und deren Wachstum gehemmt werden.
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Rolle-zu-Rolle-Produktionssystem zur kostengünstigen Herstellung antimikrobieller Folien

Medizin Aspekte Website

Ziel des »FLEXPOL«-Projekts ist der Aufbau einer Pilotlinie zur Herstellung kostengünstiger antimikrobieller Folien, die auf Oberflächen angebracht werden, mit denen Patienten besonders häufig in Berührung kommen. Indem diese Folien der Kontaminationsgefahr entgegenwirken, wird sowohl die Gesundheit der Patienten als auch die des medizinischen Personals geschützt, so wie es die hohen Hygienestandards in medizinischen Umgebungen vorsehen. Dies ist auch wirtschaftlich von Vorteil, da geringere Kosten für Reinigungs- und Desinfektionsmittel aufgebracht werden müssen.
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Roll-to-Roll Production of Large-Surface Anti-Microbial Films

Kunststoffe Website

Each year, roughly 2.6 million Europeans become infected with germs in hospitals; almost half of them die. Despite a sterile environment, there is a vast number of breeding grounds. Large-surface anti-microbial films are due to prevent bacteria from settling on surfaces. In an EU project, scientists develop the first roll-to-roll production system for this purpose.
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